Main Entry: sub·stance

Pronunciation: \ˈsəb-stən(t)s\

Function: noun

1 : physical material from which something is made or which has discrete existence <the substance of nerve tissue>
2 : matter of particular or definite chemical constitution
3 : something (as alcohol, methamphetamine, or marijuana) deemed harmful and usually subject to legal restriction <heroin is a controlled substance> <substance abuse>